This machine produce printing bags in double row,with two color detectors to chase printed color,improving production efficiency.Servo motor controlling he high-speed,stable feeding.Using the advanced color detector with high level of sencitivity,automatic discoloring,chasing the color prsidency.The machine will stop when the color disappears.Computer controlling system to set bag length anf production speed,reducing waste and saving the cost,automatic feeding,sealing,cutting,and counting and discharging.Automatic alarming for any unusual activities,improving the machine operating security.